United States heat dome forces daily life changes for millions

A persistent high‑pressure heat dome has settled over the central and southern United States, pushing temperatures to 46‑48 °C (115‑120 °F) in places such as Las Vegas, Phoenix and parts of California. Meteorologists estimate that 70‑80 million people are under extreme‑heat warnings, with night‑time temperatures remaining unusually high.

The extreme heat is driving a surge in heat‑related illnesses, including dehydration, heat stroke, cardiovascular and respiratory problems, especially among older adults, children and those with pre‑existing conditions. Health officials have urged people to stay hydrated, limit outdoor exposure and use cooling centers that many cities have opened.

The heat is also reshaping daily routines: construction, agriculture and school sports are shifting to early‑morning or evening hours, and energy demand for air‑conditioning has spiked, raising electricity bills. Local governments are accelerating climate‑adaptation measures such as expanding urban green spaces, building cooling shelters and upgrading infrastructure to protect vulnerable populations.